Oh yea, as hosting in nostr is decentralized, relay runners limit the data upload as they bare the cost of hosting your files. Self hosting is an option. I know @nostr.build offers paid hosting, some client do also, you’d have to look into paid plans, or paid relays. I think if you want to get around it for free you’ll have to likit it to short clips. @Kieran is running a streaming service @zap.stream  and there is a video platform called Flare or so, maybe that would be the starting point